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Search Results: 1 - 10 of 790777 matches for " Francisco J. A. de; "
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Rese a de "Permanencia y funcionalidad del régimen comunal agrario en Espa a y México"
Francisco J. Pe?a de Paz
Nueva antropología , 1994,
Abstract:
Obesity, diabetes mellitus and last but not least, osteoporosis
Paula, Francisco J. A. de;Rosen, Clifford J.;
Arquivos Brasileiros de Endocrinologia & Metabologia , 2010, DOI: 10.1590/S0004-27302010000200010
Abstract: knowledge about the influence of bone on intermediary metabolism corresponds to a developing area that has gained prominence. the old concept of bone and adipose tissues as inert metabolic tissues, with minor contributions to metabolic adaptations has been reconsidered in light of findings that bone is involved in the development of insulin sensitivity. similarly adipose tissue exerts important influences on bone mass development and maintenance. moreover, the use of drugs in the treatment of metabolic disorders such as diabetes mellitus can impact bone metabolism. these networks linking osteoporosis to obesity and diabetes mellitus have reinvigorated investigations in the pathophysiology of osteoporosis. the present review examines this aspect and calls attention to health care providers and potential treatments of skeletal disorder.
Risk of upper gastrointestinal bleeding and perforation associated with low-dose aspirin as plain and enteric-coated formulations
Francisco J de Abajo, Luis A García Rodríguez
BMC Pharmacology and Toxicology , 2001, DOI: 10.1186/1472-6904-1-1
Abstract: We identified incident cases of UGIC (bleeding or perforation) aged 40 to 79 years between April 1993 to October 1998 registered in the General Practice Research Database. Controls were selected randomly from the source population. Adjusted estimates of relative risk (RR) associated with current use of aspirin as compared to non use were computed using unconditional logistic regression.We identified 2,105 cases of UGIC and selected 11,500 controls. Among them, 287 (13.6%) cases and 837 (7.3%) controls were exposed to aspirin, resulting in an adjusted RR of 2.0 (1.7-2.3). No clear dose-effect was found within the range of 75-300 mg. The RR associated with enteric-coated formulations (2.3, 1.6-3.2) was similar to the one of plain aspirin (1.9, 1.6-2.3), and no difference was observed depending on the site. The first two months of treatment was the period of greater risk (RR= 4.5, 2.9-7.1). The concomitant use of aspirin with high-dose NSAIDs greatly increased the risk of UGIC (13.3, 8.5-20.9) while no interaction was apparent with low-medium doses (2.2, 1.0-4.6).Low-dose aspirin increases by twofold the risk of UGIC in the general population and its coating does not modify the effect. Concomitant use of low-dose aspirin and NSAIDs at high doses put patients at a specially high risk of UGIC.Upper gastrointestinal complications (UGIC) are the major risk associated with aspirin use [1,2,3,4]. As with non-aspirin non-steroidal antiinflammatory drugs (NSAIDs), dose appears to be a major determinant, but even with low (300/325 mg) or very low doses (75 mg) a residual amount of risk seems to persist [3,4].It has been postulated that enteric-coated formulations of aspirin, designed to resist the disintegration in acid environment and pass by the stomach without dissolution, may have an impact in reducing the risk [ 5]. The idea behind this strategy is grounded on the belief that gastric damage caused by aspirin is mainly due to a local effect [ 6]. Results from several endosc
Optimism and Burnout in Competitive Sport  [PDF]
Rosendo Berengüí, Enrique J. Garcés de los Fayos Ruiz, Francisco J. Ortín Montero, Ricardo de la Vega Marcos, José María López Gullón
Psychology (PSYCH) , 2013, DOI: 10.4236/psych.2013.49A2003
Abstract:

The aim of this study was to analyze the relationship between optimism and burnout in the context of athletic competition. The sample was composed of 227 athletes that competed in wrestling at Spain’s national level. For the assessment of constructs, the Spanish version by Otero et al. (1998) of the Life Orientation Test (LOT-R) was utilized, as well as the Inventario de Burnout para Deportistas (IBD), which was an adaptation for athletic populations by Garcés de Los Fayos (1999) of the Maslach Burnout Inventory (MBI) (Maslach & Jackson, 1981). The results demonstrate a relationship between optimism and the three dimensions of burnout, in which the athletes who are more optimistic demonstrate less emotional exhaustion, less depersonalization, and a greater perception of personal accomplishment in their athletic performance.

Kováts retention indexes of monounsaturated C12, C14, and C16 alcohols, acetates and aldehydes commonly found in lepidopteran pheromone blends.
Marques, Francisco de A.;McElfresh, J. S.;Millar, Jocelyn G.;
Journal of the Brazilian Chemical Society , 2000, DOI: 10.1590/S0103-50532000000600007
Abstract: many lepidopteran pheromones consist of blends of monounsaturated alcohols, aldehydes and acetates. these compounds frequently are obtained in only nanogram quantities from pheromone gland extracts, prohibiting use of most standard spectroscopic methods. however, use of gc retention indexes, particularly in combination with mass spectrometry and electroantennograms, can provide substantial information about trace amounts of unknowns. comparison of kováts indexes (kis) of an unknown with those of standards can provide an unambiguous identification, or at least, limit the number of possible structures to a few compounds. furthermore, because kis are highly reproducible, a full set of standards is not necessary; comparisons can be made using tables of kis determined in another laboratory. we provide here tables of the kis of almost all possible isomers of monounsaturated alcohols, aldehydes, and acetates with 12, 14, or 16 carbon chain lengths, measured on nonpolar (db-5) and polar (db-wax) stationary phases.
Efeitos da temperatura no desenvolvimento de Supputius cincticeps (St?l) (Heteroptera: Pentatomidae) alimentado com larvas de Musca domestica L.
Wanderley, Maria J. A.;Ramalho, Francisco de S.;
Anais da Sociedade Entomológica do Brasil , 1999, DOI: 10.1590/S0301-80591999000100013
Abstract: development time, survival and thermal requirements of the pentatomid predator supputius cincticeps (st?l) were studied at constant temperatures of 15, 18, 20, 23, 25, 28, 30, and 33°c, relative humidity of 70 ± 10% and a 14l:10d photoperiod. time required for development from egg to adult ranged from 27.7 (30°c) to 121 days (15°c) for individuals that originated males, and from 30.3 (28°c) to 114.0 days (15°c) to those that originated females. at 33°c the nymphs did not hatch. egg survival ranged from 23.5 (30°c) to 74.6% (25°c). nymphal survival was highest at moderate temperatures, ranging from 3% (15°c) to 56% (20°c). immature had highest survival at 20°c. lower developmental threshold temperatures for egg, nymphal development and immature phases were 10.7, 11.0, and 12.0°c for individuals that originated males, and 10.0, 12.0 and 8.9°c for those that originated females. thermal constants for egg, nymphal development and immature phases were 84.6, 410.7 and 440.1 degree-days, and 88.2, 440.1 and 643.1 degree-days, respectively, for individuals that originated males and females.
Kováts retention indexes of monounsaturated C12, C14, and C16 alcohols, acetates and aldehydes commonly found in lepidopteran pheromone blends.
Marques Francisco de A.,McElfresh J. S.,Millar Jocelyn G.
Journal of the Brazilian Chemical Society , 2000,
Abstract: Many lepidopteran pheromones consist of blends of monounsaturated alcohols, aldehydes and acetates. These compounds frequently are obtained in only nanogram quantities from pheromone gland extracts, prohibiting use of most standard spectroscopic methods. However, use of GC retention indexes, particularly in combination with mass spectrometry and electroantennograms, can provide substantial information about trace amounts of unknowns. Comparison of Kováts indexes (KIs) of an unknown with those of standards can provide an unambiguous identification, or at least, limit the number of possible structures to a few compounds. Furthermore, because KIs are highly reproducible, a full set of standards is not necessary; comparisons can be made using tables of KIs determined in another laboratory. We provide here tables of the KIs of almost all possible isomers of monounsaturated alcohols, aldehydes, and acetates with 12, 14, or 16 carbon chain lengths, measured on nonpolar (DB-5) and polar (DB-WAX) stationary phases.
New Interpretations about Clonal Architecture for the Sour Pitaya (Stenocereus gummosus, Cactaceae), Arising from Microsatellite Markers of de novo Isolation and Characterization  [PDF]
Oscar Adrián Lozano Garza, José L. León de la Luz, Susana Favela Lara, Francisco J. García de León
Open Journal of Genetics (OJGen) , 2015, DOI: 10.4236/ojgen.2015.51001
Abstract: The use of molecular markers has improved the ecological and evolutionary research in the case of clonal reproduction species, allowing the identification of boundaries among clonal modules (ramets), genetic individuals (genets), and populations. Microsatellite markers were developed for Stenocereus gummosus, a columnar cactus with both sexual and clonal reproduction which is distributed in the Sonoran Desert, Mexico. 454-Pyrosequencing reads were analyzed to detect microsatellite markers. Forty primer pairs were screened to look for polymorphism. Nine loci were genotyped for two S. gummosus localities. Sampling strategy was intended to avoid collecting a genetic individual more than once, considering that clonal architecture for this cactus was previously deduced as clumped. Polymorphic loci exhibited low allele count, ranging from 2 - 7 (mean of 3.78 ± 0.62 SE); mean heterozygosity values were 0.221 and 0.234 HO and 0.408 and 0.306 HE, with FIS of 0.383 and 0.299, for peninsular and continental localities respectively. Unexpectedly, some multilocus genotypes were found repeated within locality, which were assumed as clones since data was evaluated as sufficient (clonal richness R of 0.966 and 0.897). These results were different from those previously reported: the distribution of clones might as well be intermingled, having a minimum ramet dispersion distance of 30 m. This characteristic was also consistent with the recent colonization proposed for this and other arid lands plants. A wider genetic neighborhood, due to clone dispersion might affect diversity indexes while increasing the chance of geitonogamy and mating among relatives. The markers isolation and its population characterization allowed addressing new questions about S. gummosus ecology, clonal reproduction and reproductive biology.
Determina??o da cobertura do solo por análise de imagens e redes neurais
Varella, Carlos A. A.;Pinto, Francisco de A. de C.;Queiroz, Daniel M. de;Sena Júnior, Darly G. de;
Revista Brasileira de Engenharia Agrícola e Ambiental , 2002, DOI: 10.1590/S1415-43662002000200007
Abstract: an image classification algorithm was developed to estimate the soil cover based on artificial neural networks (ann) trained by back-propagation algorithm. the learning data sets were obtained from digital normalized images. five ann architectures of the type 25-n1-n2-2 were tested. the architecture 25-20-10-2 presented the best result and therefore, it was used in the image classification program. the classification presented an overall accuracy of 82.10%. this result shows that ann may be applied for separating features when the pixel brightness does not provide enough information to apply the threshold technique.
New Approach for Lead, Zinc and Copper Ions Elimination in Cyanidation Process to Improve the Quality of the Precipitate  [PDF]
José R. Parga, Jesús V. Valdés, Jesús L. Valenzuela, Gregorio Gonzalez, L. María de J. Pérez, T. Francisco Cepeda
Materials Sciences and Applications (MSA) , 2015, DOI: 10.4236/msa.2015.62015
Abstract: The Merrill-Crowe zinc-precipitation process has been applied worldwide on a large number of operations for recovering gold and silver from cyanide solutions. However, in some of the large plants this precipitate is of low quality, because copper and especially lead are precipitated along with gold and silver resulting in a higher consumption of zinc powder, fluxes in the smelting of the precipitate, formation of mate and short life for crucibles. In this research, a method is proposed to recover lead, zinc and copper cyanide ions from barren solutions, from the Merrill-Crowe process with hydroxyapatite before the filter press. This technology is based on inducing nucleated precipitation of zinc, copper and silver ions in a serpentine reactor, using sodium sulfide as the precipitator and sulfuric acid for pH control. This procedure was successfully applied at WILLIAM Mining and BACIS Mining Group in México.
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